Answer:
Explanation:
1. Rounding
2 0<u>83 193</u> cm
You want to round to two significant figures.
You replace all the underlined digits (all those after the first two digits) with zeroes.
The rule is: If the first figure dropped (8) is greater than 5, increase the last figure kept (0) by 1.
Then, 2 0<u>83 193</u> cm becomes 2 100 000 cm
2. Converting to scientific notation
A number in scientific notation has the form
N × 10ⁿ
where N is a decimal number called the mantissa and n is an integer called the exponent.
We must have 1 ≤ N < 10
(a) Determine the mantissa
Move the decimal place to the left to create a new number between 1 and 10.
2 1<u>00 000</u> ⟶ 2.1<u>00 000</u>; N = 2.1
(b). Determine the exponent.
The exponent is the number of times you moved the decimal to get the mantissa.
You moved the decimal six places to the left, so the exponent n = 6.
(c). Write the number in scientific notation
Answer:
Abe chutiye, Question sahi se likh laude phle
The correct answer is option A, that is, N₂O has 2 nitrogen atoms, whereas NO has only one.
A molecule with the formula NO comprises one oxygen atom and one nitrogen atom, while the molecule with the formula N₂O comprises two nitrogen atoms and one oxygen atom.
1.123 nano-grams is your answer, do you understand now gimme dat 5 star and brainiest
One liter is 1000 ml
1 ml is 1cm^3
One dm^3 is 1000 cm^3
Thus, 1 liter is 1 dm^3
The number of factors used is 4.